Laboratory Pulverizer
Small Laboratory Colloid Mill for Ultra-Fine Wet Grinding and Emulsification
Item Number: PP-SL41
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Product Overview
This small laboratory colloid mill is a high-performance fluid processing system engineered for ultra-fine grinding, emulsifying, homogenizing, and dispersing of wet materials. It combines the functions of a homogenizer, ball mill, three-roll mill, and high-shear mixer into one compact unit, achieving particle size reduction down to 2–50 µm and homogenization rates exceeding 90%. The precision gap adjustment between the rotor and stator, combined with a three-stage grinding chamber (coarse, fine, and ultra-fine), enables rapid and efficient processing. A recirculation mode further enhances control over final particle distribution, making it ideal for both single-pass and multi-pass operations.
The equipment is ideally suited for research and development, pilot-scale production, and small-batch processing in industries such as pharmaceuticals, food processing, cosmetics, chemicals, and advanced materials. Typical uses include emulsion preparation, cell disruption, pigment dispersion, and nano-scale grinding of suspensions. The versatile rotor/stator configurations allow adaptation to various material viscosities—from low-viscosity fluids to high-viscosity pastes—and desired particle sizes. Its ability to handle both liquid-liquid and solid-liquid systems makes it a versatile tool for formulation scientists and process engineers.
Built with corrosion-resistant stainless steel components and featuring a reliable direct-drive motor with separate spindle design, this mill ensures long-term dependability even under continuous operation. The integrated cooling system effectively dissipates heat, protecting heat-sensitive materials and preserving product quality. The precise gap lock mechanism maintains stable processing parameters without drift, and the unit's compact footprint (520×250 mm) saves valuable bench space. Users can expect repeatable performance and low maintenance, backed by robust construction and premium materials, making it a trusted asset for demanding laboratory environments.
Key Features
- High-Precision Rotor/Stator Assembly: The heart of the mill features precision-machined and heat-treated rotors and stators, available in multiple materials including stainless steel and hardened alloys, with various tooth profiles such as cross-serrated or straight configurations for grinding, shearing, or intensive mixing. This modular design ensures optimal particle reduction, reduced wear, and extended service life. Interchanging sets is quick and simple, enabling one machine to serve multiple processes.
- Micro-Adjustable Grinding Gap: A finely threaded adjustment ring allows micrometer-scale control of the rotor-stator gap, typically from 0.01 mm to several millimeters, enabling precise setting of the desired particle size and shear intensity. The gap is securely locked by a dedicated locking mechanism to prevent any shift during operation, guaranteeing batch-to-batch consistency.
- Three-Stage Grinding Chamber: The specially designed grinding chamber features three distinct zones: coarse breaking, fine grinding, and ultra-fine refinement. Material progressively moves through these zones under the combined action of shear, impact, and high-frequency vibration, achieving efficient size reduction with minimal temperature rise. For ultra-fine requirements, the product can be recirculated through the mill multiple times.
- Corrosion-Resistant Stainless Steel Construction: All product-contact components—including hopper, grinding chamber, rotor, stator, and discharge—are manufactured from high-grade 304 or 316L stainless steel, ensuring excellent chemical compatibility and easy cleaning. The hygienic design meets GMP requirements for pharmaceutical and food applications, with smooth surfaces that minimize residue buildup.
- Integrated Cooling System: A built-in water-cooling jacket surrounds the grinding chamber, effectively removing frictional heat generated during processing. This is crucial for temperature-sensitive materials such as emulsions, vaccines, or volatile compounds, as it prevents degradation and maintains product stability. Coolant inlet and outlet connections are standardized for easy integration with lab chillers.
- Versatile Motor and Speed Options: The unit features a separate motor-spindle design, allowing users to select standard or explosion-proof motors and adjust rotational speed according to process needs. The standard configuration offers 1.5 kW (or optional 1.1 kW) motor power with 2820 rpm speed, and the separate design simplifies maintenance and customized speed adjustments via belt or gear reduction.
- Flexible Feed and Discharge Configurations: The mill can be equipped with a standard gravity hopper for batch processing, tubular infeed/outfeed for closed-loop systems, or a complete recirculation circuit with vessel and pump. This flexibility makes it adaptable to continuous inline processes, sterile production lines, or high-viscosity recirculation grinding.
- Compact and Durable Design: With overall dimensions of 520×250×555 mm and a weight of only 70 kg, this benchtop unit is easy to install, relocate, and clean. Despite its small footprint, the robust construction absorbs vibration and withstands the mechanical stresses of heavy-duty lab use, ensuring long operational life.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Food: Nut Butters & Sauces | Grinding roasted peanuts, almonds, or sesame seeds into smooth butters, and emulsifying vinaigrettes or mayonnaises. | Produces stable emulsions with ultra-fine, creamy textures and extended shelf life without artificial stabilizers. |
| Pharmaceuticals: Oral Suspensions & Syrups | Homogenizing active pharmaceutical ingredients (APIs) in pediatric syrups, antacids, and antibiotic suspensions. | Ensures uniform drug distribution and improved bioavailability, meeting stringent pharmacopoeia standards for content uniformity. |
| Cosmetics: Creams & Lotions | Emulsifying oil and water phases for facial creams, body butters, and sunscreen lotions. The adjustable shear enables fine droplet size control. | Achieves luxurious sensory feel, long-term emulsion stability, and efficient active ingredient encapsulation. |
| Chemicals: Pigment & Dye Dispersions | Dispersing organic and inorganic pigments, titanium dioxide, or carbon black in paints, printing inks, and masterbatches. | Enhances color strength, reduces agglomerates, and improves coating gloss and opacity, lowering raw material costs. |
| Construction: Waterproofing & Ceramic Glazes | Grinding polymer-modified bitumen for waterproof membranes and homogenizing ceramic glaze suspensions for tile and sanitary ware. | Delivers consistent particle size distribution (2-20 µm) for defect-free, high-performance coating and firing results. |
| R&D: Nanomaterial Suspensions | Pilot-scale processing of nano-suspensions, graphene oxide dispersions, or quantum dots for academic and industrial research. | Provides reproducible results and scalability data for process scale-up, bridging the gap from lab to production. |
| Dairy: Processed Cheese & Yogurt | Homogenizing milk fat, proteins, and cultures for cream cheese, yogurt, and reconstituted milk products. | Improves mouthfeel, prevents whey separation, and ensures uniform culture distribution for consistent fermentation. |
| Bio-tech: Cell Disruption & Protein Extraction | Lysing E. coli, yeast, or mammalian cells to release intracellular proteins, enzymes, or DNA. The low-shear option can preserve labile compounds. | High-efficiency disruption with minimal heat generation, enabling high yields of bioactive molecules. |
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | PP-SL41 |
| Processing Fineness | 2–50 µm |
| Capacity | 0.005–0.03 t/h (5–30 kg/h)* |
| Motor Power | 1.5 kW (optional 1.1 kW) |
| Voltage | 220/380 V (single/three-phase) |
| Rotor Speed | 2820 rpm |
| Rotor Diameter | 50 mm |
| Dimensions (L×W×H) | 520×250×555 mm |
| Weight | 70 kg |
Note: Throughput varies with material properties, gap setting, and number of passes.
Why Choose This Product
- Proven Reliability in Demanding Labs: This colloid mill is engineered with premium materials and precision manufacturing, ensuring years of trouble-free operation. The robust design minimizes unscheduled downtime and maintenance costs, making it a cost-effective choice for high-usage environments.
- Unmatched Process Versatility: With interchangeable rotor/stator sets, adjustable gap control, and multiple feed/discharge options, the unit can handle a broad spectrum of materials—from low-viscosity fluids to thick pastes. It seamlessly adapts to changing R&D and production needs without additional capital expenditure.
- Precision Engineering for Consistent Quality: The advanced gap locking mechanism and rigid construction guarantee repeatable particle size distributions and homogenization quality, batch after batch. This consistency is critical for product development, quality control, and regulatory compliance.
- Comprehensive Customer Support: Our expert team provides application consultation, installation assistance, operator training, and responsive after-sales service. Custom configurations—including rotor profiles, motor specifications, and automation integration—are available to meet unique process requirements.
- Investment in Long-Term Value: While this mill represents a premium initial investment, its durability, low operating costs, and ability to scale from R&D to pilot production deliver exceptional life-cycle value. It is backed by a comprehensive warranty and a global network of service engineers.
Contact us today to discuss your specific application or request a quotation. Our engineering team can design a tailored solution—including custom rotors, control systems, and ancillary equipment—to optimize your process.
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